The ~ is the part of London where many important financial institutions have their main offices. People often refer to these financial institutions as the ~.
...a foreign bank in the ~...
The ~ fears that profits could fall.
N-PROPER: the N
CITY
Meaning of CITY in English
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012